Heating apparatus.



1. W. F. MACDONALD.

HEATING APPARATUS.

APPLICATION FILED FEB. 8. 1918 Patented Sept. 3, 1918,

2 SHEETSSHEET l.

J. W. F. MACDONALD.

HEATING APPARATUS,

APPLICATION FILED Patented Sept. 3, 1918.

2 SHEETSSHEET 2.

JOHN W. F. MACDONALD, 0F BRIGHTON, MASSACHUSETTS, ASSIGNOR TO THE MERRILL PROCESS COMPANY, A CORPORATION OF MASSACHUSETTS.

HEATING APPARATUS.

Specification of Letters Patent.

Patented Sept. 3, 191%.

Application filed. February 8, 1918. Serial No. 216,142.

To (:52 whom it may concern:

Be it known that 1, JOHN WV. F. MACDON- ALI), a citizenor" the United States, and a resident of Brighton, county of Sufiolk, and State of Massachusetts, have invented Tmprovements in Heating Apparatus, of which the following is a specification, reference being had to the accompanying drawings, forming part thereof.

This invention has reference to improvements in heating apparatus utilizing a circulating heat transporting medium.

The main object of the present invention is to control the supply of heat to the circulating heat carrying medium through a predetermined variation of the condition of 7 said medium.

Another object of the invention is to so construct a heating apparatus comprising a conduit through which a heat transporting medium may be mechanically circulated between a point of heat absorption and a point of heat utilization that variation of fluidity or flow of said medium may act to control the supply of heat to said conduit at the point of heat absorption. 1

Other objects of the invention will appear from the following description.

The invention consists in the conduit having a point of heat absorption to which point heat is supplied and a controller adapted to be actuated by a variation in the condition of a heat carrying medium circulating in said conduit to control the source of said heat.

The invention also consists in such other novel features of construction and combination of parts as shall hereinafter be more fully described and pointed out in the claims. v

Figure 1, represents a front view ofthe improved heating apparatus showing the controller 1 for controlling the supply of liquid fuel to the furnace.

Fig. 2, represents an enlarged sectional View taken on line 22 Fig. 3.

Fig. 3, represents an end view of, the controller with a portion ofa connecting pipe shown in section as taken on line 3-3 Fig. 1.

Similar characters of reference designate coresponding parts throughout. 3

In heating apparatus of this nature a viscous heat carrying medium is usually employed for transporting heat from a heat absorbing point to a point at which said heat is to be utilized. Such heat carrying medium is mechanically circulated through the continuous conduit constituted by the delivery pipe 5 and the return pipe 6 connected at their respective ends by the pipes 7 and 8 or which pipe 7 extends through the furnace 9 and has the coil or other suitable conduit 10 through which the heat carrying medium is circulated during its s jection to heat generated by the combustion of fluid fuel supplied to the burner 11 of said furace 9 through the fuel supply pipe 12. Pipe 8 has the heat radiating coil 13 or other means to utilize heat transportated to such coil 13 or means .by the viscous heat carrying medium in the circulation of said medium from the furnace 9 through pipe 5, which circulation is controlled by valve 14 of said pipe 5. Pipe 6 has the expansion pipe 15 and the valve 16 located at the suc-.

tionside of and close to the pump 17 the pump chamber of which communicates with the return pipe 6. By means of the pump 17 the viscous heat carrying medium is caused to circulate in the continuous conduit constituted by the pipes 5 and 6 and their connections 7 and 8 and their coils or members 10 and 13. it is to be noted that the pressure of the pump is exerted directly on the viscous material in the pipe 6 between said pump 17 and the pipe 7 on coil 10 and that the pressure on this portion of said viscous material is somewhat greater than on saidmaterial passing from the coil 10 and pipe 5 to the point or coil 13 of utilization. In this -latter'portion of the continuous conduit the viscous material is of a higher temperature and consequently somewhat more fluid than adjacent the pump.

Connected respectively with the pipes 5 and 6 are the pipes 181and 19 of which the pipe 18 receives the viscous fluid of the higher temperature and less viscosity from pipe 5 while the pipe 19 receives said viscous material of comparatively lower temperature and greater viscosity from pipe 6. Mounted between the ends of said plpes 18 and 19 is the frame 20 having the chambers 21 and 22 with which said pipes 18 and 19 respectively communicate. 21 and 22 respectively have the walls 23 and Said chambers I all the wall is located the expansion spring From the vvall Let extends the member carrying the pivoted lever 36 which at lLS upper end 37 engages i'od and beans against one of the actuator nuts 32 and at its lower end has the latch 58 to engage pin 39 of lever l This lever al is pivotnlly sustained in the frame ll extending helov; said walls and 2% and hzivin" t member hetn 'n which and said lIiN e1 i0 is t e tension spring which. tends constantly tomove said lever in a direction to operate the valve rod pivotnlly connected with said lever l0, to close its valve which latter is of an; usual construction and is contained in the ordinary valve housingof the huid :t'uel supply pipe In l operation of this conti'ollei. pi. i sure. OT 2 scous matei'iul in pipe 19 acting on the diaphvap'm :29 ot bellows ill in chainher 22 Will, to some extent balance the pressure 01' the viscous material in pipe 18 net-- ing on the diaphragm 28 ot' hellou's 30 in chamber and the difference between such pressures will be compensated for by spiing' Il-l under suitable adjustment oi the stop member if novv the pressure in pipe and. consequently, in pipe 18 increases from undue expansion of the viscous material in said pipe 5 h reason oi an unduly high temperature or because of the closing of valve ll while pump 17 continues to operate, such pressure a ting on diaphragm will move suid diaphragm 2S and rod ainst the pressure on diaphragm with the resultthat the nut will act on end 3? of lever 36 to swing; said lever 36 sulliciently to disengage its latch from pin 39 of lever 1 0 \vhei'eupon vsaid levci' l0 Will he drawn downward hv spring and will operate valve stem ll. to close the valve of housing l5 thus shutting oil the supply. of fuel passing thmugh pipe 12 to the furnace burner 11.

in some cases it may be desirable to operate the controller through or as 21 result of an undue increase of teinpei'ature in the \'lSC()ll material in pipe 55 acting directly on similar Oi dissimilar material in pipe 18 in which case it may and usunllyvwould be preferred to dispense vith the compensating pressure exerted on diapl'nw 29 and said diaphragm and its chanihei' could then he eliminatmh cave hemp: taken to adjustthe action of spring uccoidingljy 01 this spring could. in such case, he removed.

It is evident that the "e ease of the spring actuatec oi said which suits in the closingcontrolling tiie low of f 12 to hui'ner ll so that undue sup ly of fuel to said om-nei- 11 is prevented undei' :ihnormal condition of the heel; carrying material or liquid in the conduit wing thus described my i1 cl in}. as new and desire to secure by the n atnie continuous cone poin of heat :i soiption 2126i 9. diation to op fate i the return in nher of said conviscous substantially sihle said conduit, w

said liquid e iio is reduced 6 "itchy lliCfQilSOCl, a v of he:- aosoi'ption and having pine provided 3' l 1 lanecd con of the nature d e-- continuous conduit A eosorpti-o e burner ed acent said point 03; heat ahsoi mg a flu d fuel supply ha ing a. coil Yelling valve viscous material filling sold conch :1 pump connected with n lllQllllOEi of said conduit at; one side oi; sold heating point, pipes leading from the r spective Lil-embers oi so d conduit at opposite sides of point oi heat aesoi'ptnm. and a centre. or lo snip *el supply Valve having I of jileatine; a seemed COIHPZISLDQ L.

e,wuatingnieans connected to be op n n if] material in send pipe, CUIBPGDSSJiP once in sane pipes.

9 l J: :L o. 111 onizitns Oi the netnie ele- (1') scribed comp? sing: a continuous .7 W having point of heat absorption 22 point of heat n lization, a burner ad' said point of heat QbSOTJiZlOIl having fuel supply pipe provided "with o cont-re valve viscous i. vteiriel 1 ling said on means to circulate said VlSC-OHS niateti Ward, said point of heat absorption, wheP-fehy the condition of said viscous materi the aespective members 01 said conduit vary as to pressure, temperature and 3m? and means connected with said ct for controlling the actuation of seio supply valve, said controlling M l ing an element to he ll'liillQHCttfl tion of the pressure of vie-eons navaoaa one member of said conduit balanced by an element under pressure of viscous material in the other member of said conduit.

4. Heating apparatus of the nature described comprising a continuous conduit having a point of heat absorption, a burner adjacent said point of heat absorption having a fluid fuel supply 'having a controlling valve, viscous material filling said conduit, a pump connected with a member of said conduit at one side of said heating point,

pipes leading from the respective members of said conduit at opposite sides of said point of heat absorption, a controller hav- -compensating spring acting ing a pair of chambers with which said pipes respectively connect, diaphragms yieldingly mounted in said chambers, a shift rod against which said diaphragms act, a to move said rod in one direction, a spring actuated means for closing said fuel supply valve, anda device for holding said spring actuated means. against closing movement, said device adapted to be acted upon by a member of said shift rod to release said spring actuated means.

JOHN W. F. MACDONALD. 

